0, containing four continuous, insulated, color-coded feeder conductors, one of which shall be an equipment grounding conductor; or

(2) A metal raceway or rigid nonmetallic conduit from the disconnecting means in the mobile home to the underside of the mobile home, with provisions for the attachment to a suitable junction box or fitting to the raceway on the underside of the mobile home (with or without conductors as in Section 550-5(i)(1)). 550-6. Disconnecting Means and Branch-Circuit Protective Equipment. The branch-circuit equipment shall be permitted to be combined with the disconnecting means as a single assembly. Such a combination shall be permitted to be designated as a distribution panelboard. If a fused distribution panelboard is used, the maximum fuse size for the mains shall be plainly marked, with lettering at least ¼ inch (6.4 mm) high and visible when fuses are changed. Where plug fuses and fuseholders are used, they shall be tamperresistant Type S, enclosed in dead-front fuse panelboards. Electrical distribution panelboards containing circuit breakers shall also be dead-front type. (FPN): See Section 110-22 concerning identification of each disconnecting means and each service, feeder, or branch circuit at the point where it originated and the type marking needed. (a) Disconnecting Means. A single disconnecting means shall be provided in each mobile home consisting of a circuit breaker, or a switch and fuses and its accessories installed in a readily accessible location near the point of entrance of the supply cord or conductors into the mobile home. The main circuit breakers or fuses shall be plainly marked "Main." This equipment shall contain a solderless type of grounding connector or bar for the purposes of grounding, with sufficient terminals for all grounding conductors. The neutral bar termination of the grounded circuit conductors shall be insulated in accordance with Section 550-11(a). The disconnecting equipment shall have a rating suitable for the connected load. The distribution equipment, either circuit breaker or fused type, shall be located a minimum of 24 inches (610 mm) from the bottom of such equipment to the floor level of the mobile home. (FPN): See Section 550-15(b) for information on disconnecting means for I branch circuits designed to energize heating or air-conditioning equipment, or both, located outside the mobile home, other than room air conditioners. A distribution panelboard shall be rated not less than 50 amperes and employ a 2-pole circuit breaker rated 40 amperes for a 40-ampere supply cord, or 50 amperes for a 50-ampere supply cord. A distribution panelboard employing a disconnect switch and fuses shall be rated 60 amperes ARTICLE 550 - MOBILE HOMES AND MOBILE HOME PARKS 70-593 and shall employ a single 2-pole, 60-ampere fuseholder with 40- or 50-ampere main fuses for 40- or 50-ampere supply cords, respectively. The outside of the distribution panelboard shall be plainly marked with the fuse size. The distribution panelboard shall be located in an accessible location but shall not be located in a bathroom or a clothes closet. A clear working space at least 30 inches (762 mm) wide and 30 inches (762 mm) in front of the distribution panelboard shall be provided. This space shall extend from floor to the top of the distribution panelboard. (b) Branch-Circuit Protective Equipment. Branch-circuit distribution equipment shall be installed in each mobile home and shall include overcurrent protection for each branch circuit consisting of either circuit breakers or fuses. The branch-circuit overcurrent devices shall be rated (1) not more than the circuit conductors; and (2) not more than 150 percent of the rating of a single appliance rated 13.3 amperes or more that is supplied by an individual branch circuit; but (3) not more than the overcurrent protection size and of the type marked on the air conditioner or other motor-operated appliance. A 15-ampere multiple receptacle shall be permitted where connected to a 20-ampere laundry circuit. (c) Two-Pole Circuit Breakers. Where circuit breakers are provided for branch-circuit protection, 240-volt circuits shall be protected by a 2-pole common or companion trip, or handle-tied paired circuit breakers. (d) Electrical Nameplates. A metal nameplate on the outside adjacent to the feeder assembly entrance shall read: "This Connection for 120/240- Volt, 3-Pole, 4-Wire, 60 Hertz, Ampere Supply." The correct ampere rating shall be marked in the blank space. 550-7. Branch Circuits. The number of branch circuits required shall be determined in accordance with (a) through (c) below. (a) Lighting. Based on 3 volt-amperes per square foot (32.26 VA/sq m) times outside dimensions of the mobile home (coupler excluded) divided by 120 volts to determine the number of 15- or 20-ampere lighting area circuits, e.g., 3 X Length X Width = No. of 15- (or 20-) ampere circuits 120 X 15 (or 20) The lighting circuits shall be permitted to serve built-in gas ovens with electric service only for lights, clocks or timers, or listed cord-connected garbage disposal units. (b) Small Appliances. Small appliance branch circuits shall be installed in accordance with Section 210-52(b). (c) General Appliances. (Including furnace, water heater, range, and central or room air conditioner, etc.) There shall be one or more circuits of adequate rating in accordance with the following: (1) Ampere rating of fixed appliances not over 50 percent of circuit rating if lighting outlets (receptacles, other than kitchen, dining area, and laundry, considered as lighting outlets) are on the same circuit; 70-594 NATIONAL ELECTRICAL CODE (2) For fixed appliances on a circuit without lighting outlets, the sum of rated amperes shall not exceed the branch-circuit rating. Motor loads or other continuous duty loads shall not exceed 80 percent of the branchcircuit rating; (3) The rating of a single cord- and plug-connected appliance on a circuit having no other outlets shall not exceed 80 percent of the circuit rating; (4) The rating of a range branch circuit shall be based on the range demand as specified for ranges in Section 550-13(b)(5). (FPN No. 1): For the laundry branch circuit, see Section 220-4(c). (FPN No. 2): For central air conditioning, see Article 440. 550-8. Receptacle Outlets. (a) Grounding-type Receptacle Outlets. All receptacle outlets (1) shall be of grounding type; (2) shall be installed according to Section 210-7; and (3), except where supplying specific appliances, receptacles shall be 15- or 20-ampere, 125-volt, either single or duplex, and shall accept parallel-blade attachment plugs. (b) Ground-Fault Circuit-Interrupters. All 120-volt, single-phase, 15- and 20-ampere receptacle outlets installed outdoors and in bathrooms, including receptacles in light fixtures, shall have ground-fault circuitinterrupter protection for personnel. Ground-fault circuit-interrupter protection for personnel shall be provided for receptacle outlets located within 6 feet (1.83 m) of any lavatory or sink. Exception: Receptacles installed for appliances in dedicated spaces, such as for dishwashers, disposals, refrigerators, freezers, and laundry equipment. No receptacle shall be required in the area occupied by a toilet, shower, tub, or any combination thereof. If a receptacle is installed in such an area, it shall have ground-fault circuit-interrupter protection for personnel. Feeders supplying branch circuits shall be permitted to be protected by a ground-fault circuit-interrupter in lieu of the provision for such interrupters specified herein. (c) Cord-Connected Fixed Appliance. A grounding-type receptacle outlet shall be provided for each cord-connected fixed appliance installed. (d) Required Receptacle Outlets. Receptacle outlets shall be provided in all rooms other than the bath, closet, and hall areas, and shall be installed so that no point along the floor line is more than 6 feet (1.83 m) measured horizontally from an outlet in that space. Counter tops shall have receptacles located every 6 feet (1.83 m). The contiguous measurement of counter top and floor line shall be permitted where measured from the required receptacle in rooms requiring small appliance circuits. Receptacle outlets on small appliance circuits shall not be included in determining the spacing for receptacle outlets of other circuits. Exception No. 1: Where the measured distance is interrupted by an interior doorway, sink, refrigerator, range, oven, or cooktop, an additional receptacle outlet shall be provided where the interrupted space is at least 2 feet (610 mm) wide at the floor line and at least 12 inches (305 mm) wide at the counter top.